/*
 * Copyright (C) 2015 Jolla Ltd.
 * Contact: Slava Monich <slava.monich@jolla.com>
 *
 * You may use this file under the terms of the BSD license as follows:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   * Neither the name of Nemo Mobile nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "BooksSaveTimer.h"

#include <QCoreApplication>
#include <QTimer>

#define BOOKS_DEFAULT_INACTIVITY_TIMEOUT (1000)
#define BOOKS_DEFAULT_MANDATORY_SAVE_TIMEOUT (30000)

BooksSaveTimer::BooksSaveTimer(QObject* aParent) :
    QObject(aParent),
    iInactivityTimer(new QTimer(this)),
    iMandatarySaveTimer(new QTimer(this)),
    iSaveRequested(false)
{
    connect(qApp, SIGNAL(aboutToQuit()), SLOT(onAboutToQuit()));

    iInactivityTimer->setInterval(BOOKS_DEFAULT_INACTIVITY_TIMEOUT);
    iInactivityTimer->setSingleShot(true);
    connect(iInactivityTimer, SIGNAL(timeout()), SLOT(onTimeout()));

    iMandatarySaveTimer->setInterval(BOOKS_DEFAULT_MANDATORY_SAVE_TIMEOUT);
    iMandatarySaveTimer->setSingleShot(true);
    connect(iMandatarySaveTimer, SIGNAL(timeout()), SLOT(onTimeout()));
}

void BooksSaveTimer::requestSave()
{
    if (!iMandatarySaveTimer->isActive()) {
        iMandatarySaveTimer->start();
    }
    iInactivityTimer->start();
}

void BooksSaveTimer::cancelSave()
{
    iMandatarySaveTimer->stop();
    iInactivityTimer->stop();
}

void BooksSaveTimer::saveNow()
{
    iMandatarySaveTimer->stop();
    iInactivityTimer->stop();
    Q_EMIT save();
}

bool BooksSaveTimer::saveRequested() const
{
    return iMandatarySaveTimer->isActive();
}

void BooksSaveTimer::onTimeout()
{
    saveNow();
}

void BooksSaveTimer::onAboutToQuit()
{
    if (saveRequested()) {
        saveNow();
    }
}
